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https://www.readbyqxmd.com/read/28724263/mutagenesis-and-characterization-of-a-bacillus-amyloliquefaciens-strain-for-cinnamomum-camphora-seed-kernel-oil-extraction-by-aqueous-enzymatic-method
#1
Cheng Zeng, Rongbin Zhao, Maomao Ma, Zheling Zeng, Deming Gong
The purpose of the present study was to increase the proteinase activity of the strain NCU116 by combining ultraviolet irradiation and N-methyl-N'-nitro-N-nitroso guanidine treatment, in order to enhance the efficiency of Cinnamomum camphora seed kernel oil (CCSKO) extraction by aqueous enzymatic method (AEM). The mutated strain, designated as NCU116-1, was screened out by the ratio of hydrolytic zone diameter to colony diameter on skim milk plate. The proteinase activity (9116.1 U/ml) of NCU116-1 was increased by 31...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28723952/evidence-for-prehistoric-origins-of-the-g2019s-mutation-in-the-north-african-berber-population
#2
Rafiqua Ben El Haj, Ayyoub Salmi, Wafa Regragui, Ahmed Moussa, Naima Bouslam, Houyam Tibar, Ali Benomar, Mohamed Yahyaoui, Ahmed Bouhouche
The most common cause of the monogenic form of Parkinson's disease known so far is the G2019S mutation of the leucine-rich repeat kinase 2 (LRRK2) gene. Its frequency varies greatly among ethnic groups and geographic regions ranging from less than 0.1% in Asia to 40% in North Africa. This mutation has three distinct haplotypes; haplotype 1 being the oldest and most common. Recent studies have dated haplotype 1 of the G2019S mutation to about 4000 years ago, but it remains controversial whether the mutation has a Near-Eastern or Moroccan-Berber ancestral origin...
2017: PloS One
https://www.readbyqxmd.com/read/28723886/prolonged-viral-replication-and-longitudinal-viral-dynamic-differences-among-respiratory-syncytial-virus-rsv-infected-infants
#3
Monica E Brint, Joshua M Hughes, Aditya Shah, Chelsea R Miller, Lisa G Harrison, Elizabeth A Meals, Jacqueline Blanch, Charlotte R Thompson, Stephania A Cormier, John P DeVincenzo
BACKGROUND: Longitudinal RSV dynamics have not been well-studied despite existence of factors favoring prolonged RSV replication including: high mutation rates allowing rapid evolution and potential escape from immune control. We therefore measured viral load in previously RSV-naïve infants over prolonged time-spans. METHODS: During 2014-2015, quantitative nasal aspirates were collected from 51 RSV-PCR+ infants. Multiple parallel assessments of viral loads were quantified at each collected time point using a well-validated real-time qRT-PCR assay...
July 19, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28723738/phosphatase-and-tensin-homolog-pten-is-down-regulated-in-human-nk-t-cell-lymphoma-and-corrects-with-clinical-outcomes
#4
Xiaorui Fu, Xudong Zhang, Jinli Gao, Xin Li, Lei Zhang, Ling Li, Xinhua Wang, Zhenchang Sun, Zhaoming Li, Yu Chang, Qingjiang Chen, Mingzhi Zhang
Nasal-type natural killer/T-cell (NK/T-cell) lymphoma is a more aggressive sub-group of non-Hodgkin lymphoma, which is more common in Asia. The phosphatase and tensin homolog (PTEN) was originally discovered as a candidate tumor suppressor mutated and lost in various cancers. However, its clinical value and role in NK/T-cell lymphoma remain to be further explored. In the present study, we analyzed PTEN protein expression in 60 cases of human NK/T-cell lymphoma tissues and 40 cases of control nasal mucosa tissues specimens by immunohistochemical analysis...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28723699/intraoperative-bleeding-in-patients-with-osteogenesis-imperfecta-type-iii-treated-by-fassier-duval-femoral-rodding-analysis-of-risk-factors
#5
Pietro Persiani, Maria V Pesce, Lorena Martini, Filippo M Ranaldi, Patrizia D'Eufemia, Anna Zambrano, Mauro Celli, Ciro Villani
The surgical treatment of osteogenesis imperfecta (OI) is negatively influenced by clinical features such as osteoporosis, limb deformities and bone changes caused by bisphosphonate therapy. Blood loss during femoral nailing surgeries in patients with OI is a serious problem. Platelet anomalies have been associated with an elevation of the serum pyrophosphate originating from the platelets during clotting, even if the causality with the platelet dysfunction has not yet been established. To identify predictive risk factors regarding intraoperative bleeding, a retrospective analysis was conducted on 23 patients aged between 6 and 13 years, affected by OI type III, who were treated to correct femoral deformities or to perform an osteosynthesis for femoral shaft fractures, using the Fassier-Duval telescopic nail...
July 18, 2017: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/28723215/discrimination-cascade-enabled-selective-detection-of-single-nucleotide-mutation
#6
Lidan Li, Xianjin Xiao, Jingyang Ge, Manli Han, Xu Zhou, Lei Wang, Xin Su, Changyuan Yu
Owing to the significance of single nucleotide mutation (SNM) for personalized medicine, the detection of SNM with high accuracy has recently attracted considerable interest. Here, we present a kinetic method for selective detection of SNM based on a discrimination cascade constructed by combining the toehold strand displacement (TSD) and endonuclease IV (Endo IV) catalyzed hydrolysis. The single-nucleotide specificity of the two DNA reactions allows highly selective detection of all types of single nucleotide changes (including single-nucleotide insertion and deletion), achieving a high discrimination factor with a median of 491 which is comparable with recently reported methods...
March 24, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28723063/using-cooperatively-folded-peptides-to-measure-interaction-energies-and-conformational-propensities
#7
Maziar S Ardejani, Evan T Powers, Jeffery W Kelly
The rates and equilibria of the folding of biopolymers are determined by the conformational preferences of the subunits that make up the sequence of the biopolymer and by the interactions that are formed in the folded state in aqueous solution. Because of the centrality of these processes to life, quantifying conformational propensities and interaction strengths is vitally important to understanding biology. In this Account, we describe our use of peptide model systems that fold cooperatively yet are small enough to be chemically synthesized to measure such quantities...
July 19, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28722786/oncogenic-transformation-of-lung-cells-results-in-distinct-exosome-protein-profile-similar-to-the-cell-of-origin
#8
Richard J Lobb, Marcus L Hastie, Emma L Norris, Rosa van Amerongen, Jeffrey J Gorman, Andreas Möller
Lung cancer is responsible for the highest rate of cancer mortality worldwide. Lung cancer patients are often ineligible for tumour biopsies due to co-morbidities. As a result, patients may not have the most effective treatment regimens administered. Patients with mutations in the epidermal growth factor receptor (EGFR) have improved survival in response to EGFR tyrosine kinase inhibitors (TKIs). A non-invasive method of determining EGFR mutations in patients would have promising clinical applications. Exosomes have the potential to be non-invasive novel diagnostic markers in cancer...
July 19, 2017: Proteomics
https://www.readbyqxmd.com/read/28722683/comparison-of-direct-sequencing-and-amplification-refractory-mutation-system-for-detecting-epidermal-growth-factor-receptor-mutation-in-non-small-cell-lung-cancer-patients-a-systematic-review-and-meta-analysis
#9
Qi Feng, Zu-Yao Yang, Jia-Tong Zhang, Jin-Ling Tang
BACKGROUND: Direct sequencing and amplification refractory mutation system (ARMS) are commonly used to detect epidermal growth factor receptor (EGFR) mutation status in patients with non-small-cell lung cancer to inform the decision-making on tyrosine kinase inhibitors treatment. This study aimed to systematically compare the two methods in terms of the rate of detected mutations and the association of detected mutations with clinical outcomes. MATERIAL AND METHODS: PubMed, EMBASE, China National Knowledge Infrastructure (in Chinese) and Wanfang database (in Chinese) were searched to identify relevant studies...
July 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28721579/survival-of-patients-with-cystic-fibrosis-depending-on-mutation-type-and-nutritional-status
#10
A Szwed, A John, J Goździk-Spychalska, W Czaiński, W Czerniak, J Ratajczak, H Batura-Gabryel
The purpose of the study was to evaluate the influence of nutrition and of the severity of mutation type on survival rate in cystic fibrosis (CF) patients. Data were longitudinally collected from 60 hospitalized adult CF patients, aged 18-50. The variables consisted of body mass index (BMI) ratio, Cole's BMI cut-off points, severity of mutation type, and survival rate of CF patients. We found that the mean BMI was strongly associated with the severity of mutation type and was significantly lower in patients with severe mutations of grade I and II...
July 19, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28721096/comparison-of-gefitinib-as-first-and-second-line-therapy-for-advanced-lung-adenocarcinoma-patients-with-positive-exon-21-or-19-del-epidermal-growth-factor-receptor-mutation
#11
Nishant Patel, Pingping Wu, Haijun Zhang
OBJECTIVES: Gefitinib, a tyrosine kinase inhibitor (TKI) targeting epidermal growth factor receptor (EGFR), shows excellent clinical benefit in treating advanced non-small-cell lung cancer (NSCLC). The aim of this study was to compare the efficacy and toxicity of gefitinib as first-line therapy and second-line therapy for advanced lung adenocarcinoma patients with positive exon 21 (L858R) or exon 19 deletion of EGFR mutation. METHODS: We retrospectively analyzed the clinical data of 60 EGFR-mutated advanced lung adenocarcinoma patients from July 2011 to November 2015 who have received oral gefitinib 250 mg once daily...
2017: Cancer Management and Research
https://www.readbyqxmd.com/read/28721032/-11-c-pib-pet-imaging-reveals-that-amyloid-deposition-in-cases-with-early-onset-alzheimer-s-disease-in-the-absence-of-known-mutations-retains-higher-levels-of-pib-in-the-basal-ganglia
#12
Young Chul Youn, Jae-Won Jang, Su-Hyun Han, HyeRyoun Kim, Ju-Won Seok, Jun Soo Byun, Kwang-Yeol Park, Seong Soo A An, In Kook Chun, SangYun Kim
PURPOSE: Early-onset Alzheimer's disease (EOAD) has a different pathologic burden and clinical features compared with late-onset Alzheimer's disease (LOAD). We examined the effects of age at onset on the burden and distribution of β-amyloid in patients with EOAD, in whom well-characterized mutations associated with Alzheimer's disease were absent. METHODS: We genotyped ApoE, APP, PSEN1 and PSEN2 in the patients with Alzheimer's disease: 9 patients with EOAD (age <65), 11 with LOAD (age >70) and 8 normal controls (NCs), all of whom had undergone (11)C-labeled Pittsburgh compound B-positron emission tomography imaging...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/28720543/involvement-of-the-bh3-only-pro-apoptotic-bik-nbk-in-braf-mek-inhibitor-induced-apoptosis-in-melanoma-cell-lines
#13
Andreas Borst, Sebastian Haferkamp, Johannes Grimm, Manuel Rösch, Guannan Zhu, Sen Guo, Chunying Li, Tianwen Gao, Svenja Meierjohann, David Schrama, Roland Houben
In patients with BRAF-mutated melanoma specific inhibitors of BRAF(V600E) and MEK1/2 frequently induce initial tumor reduction, frequently followed by relapse. As demonstrated previously, BRAF(V600E)-inhibition induces apoptosis only in a fraction of treated cells, while the remaining arrest and survive providing a source or a niche for relapse. To identify factors contributing to the differential initial response towards BRAF/MEK inhibition, we established M14 melanoma cell line-derived single cell clones responding to treatment with BRAF inhibitor vemurafenib and MEK inhibitor trametinib predominantly with either cell cycle arrest (CCA-cells) or apoptosis (A-cells)...
July 15, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28720314/antibiotic-susceptibility-of-helicobacter-pylori-strains-isolated-from-iranian-children-high-frequency-of-a2143g-point-mutation-associated-with-clarithromycin-resistance
#14
Shima Mahmoudi, Setareh Mamishi, Maryam Banar, Sepideh Keshavarz Valian, Abbas Bahador, Mehri Najafi, Fatemeh Farahmand, Babak Pourakbari
OBJECTIVE: Increasing antibiotic resistance in Helicobacter pylori is a global concern and is associated with treatment failure. The aim of this study was to evaluate antibiotic resistance of H. pylori to different antibiotics including amoxicillin, erythromycin, ciprofloxacin, furazolidone, tetracycline, metronidazole and clarithromycin and to detection of A2143G mutation in clarithromycin resistant isolates by real-time PCR technique. METHODS: Ninety patients with upper gastrointestinal symptoms were enrolled in this study...
July 15, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28719630/oligo-and-dsdna-mediated-genome-editing-using-a-teta-dual-selection-system-in-escherichia-coli
#15
Young Shin Ryu, Sathesh-Prabu Chandran, Kyungchul Kim, Sung Kuk Lee
The ability to precisely and seamlessly modify a target genome is needed for metabolic engineering and synthetic biology techniques aimed at creating potent biosystems. Herein, we report on a promising method in Escherichia coli that relies on the insertion of an optimized tetA dual selection cassette followed by replacement of the same cassette with short, single-stranded DNA (oligos) or long, double-stranded DNA and the isolation of recombinant strains by negative selection using NiCl2. This method could be rapidly and successfully used for genome engineering, including deletions, insertions, replacements, and point mutations, without inactivation of the methyl-directed mismatch repair (MMR) system and plasmid cloning...
2017: PloS One
https://www.readbyqxmd.com/read/28719607/stress-induced-mutagenesis-stress-diversity-facilitates-the-persistence-of-mutator-genes
#16
Marta Lukačišinová, Sebastian Novak, Tiago Paixão
Mutator strains are expected to evolve when the availability and effect of beneficial mutations are high enough to counteract the disadvantage from deleterious mutations that will inevitably accumulate. As the population becomes more adapted to its environment, both availability and effect of beneficial mutations necessarily decrease and mutation rates are predicted to decrease. It has been shown that certain molecular mechanisms can lead to increased mutation rates when the organism finds itself in a stressful environment...
July 18, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28719574/ancient-european-dog-genomes-reveal-continuity-since-the-early-neolithic
#17
Laura R Botigué, Shiya Song, Amelie Scheu, Shyamalika Gopalan, Amanda L Pendleton, Matthew Oetjens, Angela M Taravella, Timo Seregély, Andrea Zeeb-Lanz, Rose-Marie Arbogast, Dean Bobo, Kevin Daly, Martina Unterländer, Joachim Burger, Jeffrey M Kidd, Krishna R Veeramah
Europe has played a major role in dog evolution, harbouring the oldest uncontested Palaeolithic remains and having been the centre of modern dog breed creation. Here we sequence the genomes of an Early and End Neolithic dog from Germany, including a sample associated with an early European farming community. Both dogs demonstrate continuity with each other and predominantly share ancestry with modern European dogs, contradicting a previously suggested Late Neolithic population replacement. We find no genetic evidence to support the recent hypothesis proposing dual origins of dog domestication...
July 18, 2017: Nature Communications
https://www.readbyqxmd.com/read/28719510/evaluation-of-the-clinical-and-laboratory-characteristics-of-previously-followed-up-thalassemia-intermedia-patients-to-provide-them-better-care-in-the-future
#18
Özlem Tüfekçi, Berna Atabay, Meral Türker, Şebnem Yilmaz Bengoa, Salih Gözmen, Tuba Karapinar, Hale Ören, Gülersu İrken
The increased awareness about the severity of complications in thalassemia intermedia patients led authorities to develop strategies for better management and follow-up of these patients. In this study, we aimed to define the clinical and laboratory characteristics in previously followed-up β-thalassemia intermedia patients and wanted to gain an insight about the follow-up of this patient population in a developing country to provide them better care in the future. The mean age at diagnosis was 4 years, and the mean hemoglobin was 7...
July 17, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28719349/identification-of-g2607a-mutation-in-egfr-gene-with-a-significative-rate-in-moroccan-patients-with-bladder-cancer
#19
W El Hamdani, K Hadami, M Bensaid, H El Ahanidi, A Ameur, A Filali Maltouf, M Abbar, M Attaleb, A Albouzidi, M El Mzibri
The epidermal growth factor receptor (EGFR) is involved in the regulation of several cellular processes and in the development of many human cancers. Somatic mutations of EGFR at tyrosine kinase domain have been associated with clinical response to tyrosine kinase inhibitors (TKIs) in lung cancer patients. In this study, we evaluated the frequency of point mutations in EGFR for future use of TKI in clinical treatment of bladder cancer. A total, 50 Moroccan patient specimens with bladder cancer and 48 healthy controls were analysed for EGFR mutations in the region delimiting exons 18-21 by PCR amplification and direct sequencing...
May 20, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28718305/outcome-evaluation-of-patients-with-newly-diagnosed-anaplastic-gliomas-treated-in-a-single-institution
#20
Federico Pessina, Pierina Navarria, Luca Cozzi, Stefano Tomatis, Elena Clerici, Anna Maria Ascolese, Matteo Simonelli, Matteo Perrino, Marco Riva, Marco Rossi, Roberta Rudà, Armando Santoro, Lorenzo Bello, Marta Scorsetti
AIM: To evaluate the outcome of newly diagnosed anaplastic glioma patients treated in our institution in relation to the 2016 WHO classification suggestions. METHODS: This retrospective study included patients who underwent surgery plus adjuvant chemotherapy alone or concomitant and adjuvant chemoradiotherapy. Response was recorded using the Response Assessment in Neuro-Oncology criteria. RESULTS: 123 patients were analyzed. The median progression-free survival time and the 2, 3 and 5 years progression-free survival rate were 27 months, 65...
July 18, 2017: CNS Oncology
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